This bulletin applies to 2015-2016 RAM 1500 trucks equipped with four-corner air suspension and built on or after December 4, 2014, and on or before February 22, 2016.
Customers may experience no ride height change under very cold conditions, in addition to the warning light on. The following diagnostic trouble codes (DTCs) may have set:
C15A1-00 (unable to obtain desired ride height)
C1562-98 (ride height air pump control...component pr system over temperature)
C1562-92 (height air pump control performance or incorrect operation)
C159F-92 (air suspension reverse valve 1 control...performance or incorrect operation)
C15A0-92 (air suspension reverse valve 2 control....performance or incorrect operation)
C155E-92 (height pressure vent control...performance or incorrect operation)
C15AA-00 (air leak during event)
Using a scan tool first verify that all systems are working as designed and repair as needed. Then reprogram the ASCM (air suspension control module) with the latest software.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.